Server-side request forgery in Appwrite Browser Screenshot Service
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Information disclosure
- Confidentiality · integrity · availability
- Low · None · None
- Fix status
- Fixed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-918 and the CVSS impact.
Summary
Appwrite from 2.0 before 2.4.0 is affected. Manipulating the url argument of the PublicHostname function in the Browser Screenshot Service causes server-side request forgery (CWE-918). A remote attacker can make the server send requests to destinations the attacker chooses, without authentication or user interaction, with low confidentiality impact.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
Description from the CNA
A weakness has been identified in Appwrite up to 2.3.0. This vulnerability affects the function PublicHostname of the file src/Appwrite/Platform/Modules/Avatars/Http/Screenshots/Get.php of the component Browser Screenshot Service. This manipulation of the argument url causes server-side request forgery. The attack can be initiated remotely. Upgrading to version 2.4.0 is able to resolve this issue. Patch name: 393255e7302ae5503331d45802e2eee01c6a47fe. You should upgrade the affected component.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- Poc
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| — | Appwrite | 2.0; 2.1; 2.2; 2.3.0 | 2.4.0 | Patch available | CNA |
- Appwrite Vendor— Affected 2.0; 2.1; 2.2; 2.3.0 Fixed in 2.4.0 Patch available CNA
Remediation
Upgrade Appwrite to version 2.4.0, which fixes the issue. The fix is patch 393255e7302ae5503331d45802e2eee01c6a47fe.
Written with Claude Haiku 5.5 from the sources below · 2026-10-29
- Fix · CNA Appwrite Fixed in 2.4.0
Timeline
- 2026-10-11 Threatist record created from CVE-2026-108770
- 2026-10-12 Alias added: GHSA-cfw6-h8vp-h745
- 2026-10-12 Priority changed: MEDIUM → LOW
- 2026-10-13 CISA SSVC decision points changed
- 2026-10-13 Priority changed: LOW → HIGH
References
Sources
- CVE-2026-108770 · CVE Program
- CVE-2026-108770 · NVD
- FIRST EPSS
- GHSA-cfw6-h8vp-h745 · GitHub Advisory Database · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences